Formation of passages between chambers



1, 20, March 1927 H. c. ZIMMERMAN 6 850 FORMATION OF PASSAGES BETWEEN CHAMBERS Filed Sept. 11. 1924 F I v r L:. El.

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vPatented Mar. 15, 1927.

HARRY C. ZIMMERMAN, OF WASHINGTON, DISTRICT OF COLUMBIA.

FORMATION OF PASSAGES BETWEEN CHAMBERS.

Application filed September 11, 1924.

Serial No. 737,174.

(GRANTED UNDER THE ACT OF MARCH 3, 1883; 22 STAT. L. 625.)

The invention described herein may be used by the Government, or any of its officers or employees in prosecution of work for the Government, or by any other person in the United States, without payment to me of any royalty thereon, in accordance with the act of March 3, 1883.

The subject of the present invention relates to the formation of passages between chambers.

This invention has reference particularly to cradles for ordnance of a type which employes a hydro-pneumatic recoil mechanism. The cradle is formed with parallel chambers, one of the outer chambers forming a partitioned oil and air reservoir and the other a receiving chamber for the intermediate recoil chamber. For the purpose of permitting oil and air to pass from the reservoirs to the receiving chamber or vice versa, a passage is formed at either end of the cradle and is positioned underneath the intermediate or recoil chamber.

Heretofore, these passages have been formed either by inserting a drilling tool through the opening in the chambers and drilling downwardly inclined intersecting passages at an angle to the axis of the chainbers or by drilling transversely through the cradle to connect the outer chambers. The first method requires a delicate operation involving precise and accurate measurements while the latter method positions the passage in dangerous proximity to the intermediate chamber. According to the present invention, the cradle is formed with transverse locks on its under face so that intersecting passages may be drilled from an accessible position and a proper thickness maintained between the passage and the intermediate chamber.

To these and other ends, my invention consists in the construction, arrangement, and combination of elements, described here inafter and pointed out in the claims forming a part of this specification.

A practical embodiment of my invention is illustrated in the accompanying drawing, in which,

Fig. 1 is a plan view of the cradle;

. communicating Fig. 2 is a view in side elevation thereof;

Fig. 3 is an end view; and

Fig. at is a transverse sectional view taken through the cradle adjacentone of the communicating passages.

Referring to the drawing by numerals of reference:

According to the invention, the cradle 11 is formed with a plurality of longitudinal parallel chambers, the central chamber 12 receiving a recoil piston which is indicated at 15 and is retractable with the gun to force 011 into the receiving chamber 13 to move a floating piston (not shown) contained therein to compress air which passes to the reservoir chamber 14 through a communicating passage 16. The reservoir chamber l t may 'be partitioned to store a supply or reserve of which through suitably pumping apparatus may be forced through a communicating passage, similar, in all respects to the passage 16, into the receiving chamber.

The cradle is forged with a transverse block 17 on its under side both front and rear and may be conveniently notched to reduce weight. The block is angularly drilled from each side to the opposite chamber,rthe intersecting bores 18 forming the passage 16 between the chambers 13 and 14. The resulting passage 16 will be V-shaped to underlie the intermediate recoil chamber 12.

It will be obvious that the method of forming the blocks on the cradle may be applied to any piece of work which presents a similar problem in forming a communieating passage between chambers.

While in the foregoing there has been illustrated and described such combination and arrangement of elements as constitute the preferred embodiment of my invention, it is nevertheless desired to emphasize the fact that interpretation of the invention should only be conclusive when made in the light of the subjoined claims.

I claim:

1. A cradle having a plurality of chambers, a block formed transversely on the cradle, and said cradle having a V-shaped communicating passage between the outermost chambers formed by intersecting bores originating in the block.

2. A inemberhaving a plurality of chainhers, a black formed transversely thereon,

and said member having a communicating passage between the chambers formed by intersecting bores originating 1n the block.

3. A cradle having a plurality of parallel chambers in substantially the same plane, a 10 block formed transversely on the cradle and H. :C. ZIMMERMAN. 

